We added 2 new icons to show the status of books:
Downloading: Its either downloading or in download queue
Converting: Its either converting to mp3 or in the conversion queue.
We added the ability to remove books from the download or convert queues (and stop the process). Select one or more books and Action: Cancel Jobs. This can be good if you normally don't want books converted/downloaded, but they get added by mistake or automation. This was an issue request. #133
Found one bug affecting zombie thread processes in conversion/download queue logic. Caused the CPU to spike. Should fix issue #132.